Abstract

A faunal study on amphipods in Ulleungdo Island was conducted during the spring and summer periods in 2023. In this study, 64 amphipod species in 39 genera, 22 families were founded. Including previous studies, a total of 75 species of amphipods were reported in Ulleungdo Island. Among these 22 families, the family Caprellidae with 17 species showed the highest abundance. Ampithoidae with 5 species was subdominant family. Protohyale (Boreohyale) triangulata Hiwatari, 2003 belonging to the family Hyalidae, was identified at 16 of the 27 sites and had the highest frequency of appearance among the total species. Among the 64 species, Aoroides longimerus Ren & Zheng, 1996, Melita panda Tomikawa, Yamato & Ariyama, 2024, and Vibilia australis Stebbing, 1888 are newly recorded species in Korean fauna. The newly recorded species are fully illustrated and compared with related species. We provide an amphipod fauna in Ulleungdo Island with a list, figures, and tables.